Yes, I've used those. Early GPSs were good for hikers who needed to know where they were in the wilderness. Finding out your lat/long or location on a map without any information about how to get where you want to go is far less useful. Maybe you've got a need to get an overview of where you are and see particular POI's in the vicinity - and I admit this can be useful when traveling and when looking for the hotspots listed in the maps provided in the n810 now, but right now for my needs the GPS is a pointless and expensive afterthought in the n810. Just like the camera is.

Whatever floats your boat as well. I loathe virtual keyboards and type much slower on them than real keyboards. I like my n810, and would certainly recommend it to anyone who felt like I do about software keyboards. But don't misunderstand what I was saying - I was not recommending the n810 over the n800 so much as pointing out the weaknesses of using a BT keyboard.
I never said the n810 had a transflective screen, and I very specifically <i>did</i> say that I can't compare it to an n800 screen because I've never used one. But I stand by what I did say, which is that the n810 screen is very good and readable in sunlight like my old HP iPaq 1910 (with transflective screen) used to be.
Again, you seem to have taken what I said in the wrong way. I don't know how I could be any clearer: the inclusion of GPS on the n810 clearly makes it more expensive, and in my opinion there is little value in that extra cost. So don't act like you scored a >zing<
Psion Netbooks were interesting back in 2000 when they came out. Now they're outdated. That old OS chugs along with no support for a wireless standard that had barely been invented at that point. It's going to provide loads of fun in tinkering time trying to configure it to work with existing hardware and software. And though it may have memory card slots, good luck finding anything that will work in them - drivers are going to be few, and there will not be support for high-capacity memory cards. The screen is a crappy old STN screen that has response times like my grandma on lithium. No support for anything web 2.0. Never mind the issues of replacement batteries and out-of-warranty repairs... I could go on. Sure, if you're a tinkerer and like those old machines, or just want to find something to hack out a doc you might be able to use the Psion Netbook, but I would consider it a waste of money at nearly any price.